function submitenter(myfield,e)
{
	var keycode;

	if (window.event) keycode = window.event.keyCode;
	else if (e) keycode = e.which;
	else return true;

	if (keycode == 13)
	{
		validate(myfield.form);
		return false;
	}
	else
		return true;
}

function validate(myform)
{
	var valid = true;

	if (myform.Username.value == "")
	{
		myform.Username.style.backgroundColor = '#FFDDDD';
		valid = false;
	}
	else { myform.Username.style.backgroundColor = '#FFFFFF'; }
		
	if (myform.Password.value == "")
	{
		myform.Password.style.backgroundColor = '#FFDDDD';
		valid = false;
	}
	else { myform.Password.style.backgroundColor = '#FFFFFF'; }

	if (valid) { myform.submit(); }
}

function PicOn(self) { self.src = 'images/overlay_over.png'; }
function PicOff(self) { self.src = 'images/overlay.png'; }